Question

Plant growth in length is due to activity of

• A. Apical meristem
• B. Dermatogen
• C. Periblem
• D. Lateral meristem

Answer 1

The correct option is A Apical meristem

• The apical meristematic tissues are present at the shoot tips and root tips in plants.
  
• They are actively dividing metabolic cells which continuously divided to form three distinct layer at the shoot and root tip.
  
• The layers are- dermatogen to the outer side, periblem is present between the dermatogen and plerome which forms the cortex region, plerome to the inner side which forms the stele.
  
• These meristematic tissues are responsible for the primary growths in plants which are achieved by the elongation of shoot tip and root tip.
  

So, the correct answer is 'Apical meristem'.